India is the leading producer in sheet mica.
Although mica is widely distributed but workable deposits occur in three principle belts.
They are in the states of Andhra Pradesh, Jharkhand, Bihar and Rajasthan.
Bihar and Jharkhand produces the high-quality ruby mica.
The mica belt in Bihar and Jharkhand extends from Gaya district in the west through Hazaribagh and Munger district to Bhagalpur district in the east.
Outside this main belt, mica occurs in Dhanbad, Palamau, Ranchi and Singhbhum district.
The state supplies more than 80% of the India’s output.
In Andhra Pradesh mica is found in a belt in Nellore district.
Rajasthan is the third largest mica producing state.
Mica occurs in Jaipur, Udaipur, Bhilwara, Ajmer and Kishangarh districts.
The quality of mica is inferior.
Besides these three belts, some deposits occur in Kerala, Tamil Nadu and Madhya Pradesh.
Mica mining in India was mainly done for export.
The principal importing country was the U.S.A. which took about 50 percent of the exports.